Beginning Databases with Postgre SQL phần 7 docx

... index); MatthewStones_ 478 9.book Page 3 97 Wednesday, February 23, 2005 6:49 AM 392 CHAPTER 13 ■ ACCESSING POSTGRESQL FROM C USING LIBPQ Executing SQL with libpq Now that we can connect to a PostgreSQL database ... quotes within the SQL statement will need to be escaped with back- slashes, as is necessary with psql. As with connection structures, result objects must also be fre...

Ngày tải lên: 09/08/2014, 14:20

... conformance to SQL9 2: Entry SQL, Intermediate SQL, and Full SQL. By far, the most common conformance level is Entry SQL. ■Note PostgreSQL is very close to SQL9 2: Entry SQL conformance, with only ... the SQL used by Oracle, SQL Server, PostgreSQL, and other database systems. MatthewStones_ 478 9C01.fm Page 8 Tuesday, February 1, 2005 7: 25 AM iv ■CONTENTS AT A GLANCE APPEND...

Ngày tải lên: 09/08/2014, 14:20

... for PostgreSQL postgresql-pl PostgreSQL server support for Perl postgresql-python PostgreSQL server support for Python postgresql-tcl PostgreSQL server support for Tcl postgresql-test PostgreSQL ... shown in Figure 3-1. postgresql-devel Header files and libraries for development postgresql-docs Documentation postgresql-jdbc Java database connectivity for PostgreSQL postgresql-odbc Open databa...

Ngày tải lên: 09/08/2014, 14:20

... replaced with =#. psql commands are of two different types: • SQL commands: We can issue any SQL statement that PostgreSQL supports to psql, and it will execute it. • Internal commands: These are psql ... Mr | Gavyn | Smith | 23 Harlestone | Milltown | MT7 7HI | 74 6 372 5 17 | Mr | Shaun | O'Rourke | 32 Sheepy Lane | Milltown | MT9 8NQ | 74 6 3956 (2 rows) bpsimple=# ■Note In...

Ngày tải lên: 09/08/2014, 14:20

... test-> 1.2345 678 9, 1.2345 678 9); INSERT 178 85 1 test=> INSERT INTO testtype VALUES(-3 276 8, -12345 678 9, 12345 678 9.12345 678 9, test-> 2345 678 9.12345 678 9, 12345 678 9.12345 678 9); ERROR: numeric ... | -100 | 123.4 57 | 123.4 57 | 123.46 -3 276 8 | -12345 678 9 | 1.234 57 | 1.234 57 | 1.23 -3 276 8 | -12345 678 9 | 1.23457e+008 | 1.23457e+008 | 123.12 (4 rows) test...

Ngày tải lên: 09/08/2014, 14:20

... + + + + + internal | f | f | 0 | 2246 | c | f | f | 0 | 22 47 | plpgsql | t | t | 176 01 | 176 02 | sql | f | t | 0 | 2248 | {=U/postgres} (4 rows) bpfinal=# ■Note createlang can be used to ... of the PostgreSQL documentation. ■Tip The PostgreSQL documentation can be installed as a set of HTML pages that can be viewed locally with any web browser. Select file://usr/local/pgsql/doc/...

Ngày tải lên: 09/08/2014, 14:20

... tty1 00:00:00 postgres: postgres template1 192.168.0.2(32 17) idle root 13218 2032 0 20:19 tty2 00:00:00 psql -U postgres template1 postgres 13219 2006 0 20:19 tty1 00:00:00 postgres: postgres template1 $ The ... /opt/pgdata drwxr-xr-x 2 postgres postgres 4096 Nov 21 14: 07 /opt/pgdata # Now we are ready to create a PostgreSQL tablespace associated with our new directory. We must do thi...

Ngày tải lên: 09/08/2014, 14:20

... 6:44 PM 442 CHAPTER 14 ■ ACCESSING POSTGRESQL FROM C USING EMBEDDED SQL EXEC SQL include sqlca; EXEC SQL whenever sqlwarning sqlprint; EXEC SQL whenever sqlerror do GiveUp(); void GiveUp() { fprintf(stderr, ... and c.town = :town; EXEC SQL open mycursor; EXEC SQL whenever sqlwarning continue; EXEC SQL whenever sqlerror continue; while(sqlca.sqlcode == 0) { MatthewStones_...

Ngày tải lên: 09/08/2014, 14:20

... shows the PostgreSQL data types for date and time. Character Types Table B-5 shows the PostgreSQL character data types. Table B-4. PostgreSQL Types for Date and Time SQL Name PostgreSQL Alternative ... the PostgreSQL developers, all the best with this outstanding open- source database. MatthewStones_ 478 9C18.fm Page 541 Friday, March 4, 2005 6: 47 PM APPENDIX B ■ POSTGRESQL DATA TYPES...

Ngày tải lên: 09/08/2014, 14:20

... 319 PostgreSQL files, 47 transactions, 2 47 log functions, 274 log_connections option PostgreSQL.conf file, 315 log_destination option PostgreSQL.conf file, 314 log_disconnections option PostgreSQL.conf ... 475 DBI features, 483 DBI module, 469 DBIx modules, 484 DBIx::Easy, 484–485 DBIx::XML_RDB module, 485 executing SQL, 477 – 478 installing DBI, 468– 472 and PostgreSQL DBD from sourc...

Ngày tải lên: 09/08/2014, 14:20